Hinge for furniture units with cornice, provided inside with a spring device suitable to produce a pushing force on the door in the opening direction, in such as way as to be coupled with a holding device, for example of the ratchet type, and avoid the use of handles or other grasping elements. This hinge, with a single pivot pin, has an elastic element or spring, of the flat or steel wire type, fixed in a box or furniture element integral with the door, capable of exerting a pushing force on a cam or projection analogous to the fixing arm of the hinge and disposed so as to obtain a moment in the opening direction. Advantageous variants include a cam constituted by a separate plastic element fixed to the arm of the hinge or by one or more tabs produced on said arm. Advantageously, the spring can exert the pushing force during opening directly on the box, on the back of the fixing arm or on the lateral ribs of said arm.